mcbsp_spi.asm

来自「基于TI公司的5509平台的FLASH读写程序」· 汇编 代码 · 共 235 行

	.include "mcbsp_reg.asm"
	.def setTo8BitMode_
	.def setTo16BitMode_
	;.def setTo5_8BitMode_
	.def setTo40BitMode_
	.def SPIModeInitial ;the default is also 8BitMode
SPIModeInitial:
	;reset the mcbsp usin serial port control register2
	*port(SPCR1_0)=#1800h;#0210h	;0200
	
	;set the mcbsp value
	*port(SPCR2_0)=#0200h;#2010h;80
	;pin control register
	*port(PCR0)=#0a0dh  ;active high, 3 is thoery value. 
	
	*port(RCR1_0)=#0000h ;receive frame don't ignal, and delay=1 bit
	*port(RCR2_0)=#0001h
	
	*port(XCR2_0)=#0001h;;change here
	*port(XCR1_0)=#0000h ;change here for the frame length and word length
	
	
	;set the mcbsp clk freqency in sample rate generater 2
	*port(SRGR2_0)=#2008h;#3028h;
	*port(SRGR1_0)=#0009h ;change the frequency here to /9+1
	repeat(#10)
	nop_16	
	;de-reset the serial port control register2 by 3 steps
	;1: sample rate generate
	;2: dx and dr
	;3: frame syc. 
	*port(SPCR2_0)=#0240h;#0250h
	repeat(#20)
	nop_16
	
	*port(SPCR2_0)=#0241h
	*port(SPCR1_0)=#1801h;old value is 0080 disable or 0081 enable
	
	*port(SPCR2_0)=#02c1h
	repeat(#80)
	nop_16	
	return
	
setTo8BitMode_2:
	
	;reset the mcbsp usin serial port control register2
	*port(SPCR1_0)=#1800h;#0210h	;0200
	
	;set the mcbsp value
	*port(SPCR2_0)=#0200h;#2010h;80
	;pin control register
	*port(PCR0)=#0a0dh  ;active high, 3 is thoery value. 
	
	*port(RCR1_0)=#0000h ;receive frame don't ignal, and delay=1 bit
	*port(RCR2_0)=#0001h
	
	*port(XCR2_0)=#0001h;;change here
	*port(XCR1_0)=#0000h ;change here for the frame length and word length
	
	
	;set the mcbsp clk freqency in sample rate generater 2
	*port(SRGR2_0)=#2008h;#3028h;
	*port(SRGR1_0)=#0009h ;change the frequency here to /9+1
	repeat(#10)
	nop_16	
	;de-reset the serial port control register2 by 3 steps
	;1: sample rate generate
	;2: dx and dr
	;3: frame syc. 
	*port(SPCR2_0)=#0240h;#0250h
	repeat(#20)
	nop_16
	
	*port(SPCR2_0)=#0241h
	*port(SPCR1_0)=#1801h;old value is 0080 disable or 0081 enable
	
	*port(SPCR2_0)=#02c1h
	repeat(#80)
	nop_16	
	return

setTo16BitMode_2:
	;reset the mcbsp usin serial port control register2
	*port(SPCR1_0)=#1800h;#0210h	;0200
	
	;set the mcbsp value
	*port(SPCR2_0)=#0200h;#2010h;80
	;pin control register
	*port(PCR0)=#0a0dh  ;active high, 3 is thoery value. 
	
	*port(RCR1_0)=#0040h ;receive frame don't ignal, and delay=1 bit
	*port(RCR2_0)=#0001h
	
	*port(XCR2_0)=#0001h;;change here
	*port(XCR1_0)=#0040h ;change here for the frame length and word length
	
	
	
	;set the mcbsp clk freqency in sample rate generater 2
	*port(SRGR2_0)=#2010h;#3028h;
	*port(SRGR1_0)=#0009h ;change the frequency here to /9+1
	repeat(#10)
	nop_16	
	;de-reset the serial port control register2 by 3 steps
	;1: sample rate generate
	;2: dx and dr
	;3: frame syc. 
	*port(SPCR2_0)=#0240h;#0250h
	repeat(#20)
	nop_16
	
	*port(SPCR2_0)=#0241h
	*port(SPCR1_0)=#1801h;old value is 0080 disable or 0081 enable
	
	*port(SPCR2_0)=#02c1h
	repeat(#80)
	nop_16	
	return
setTo16BitMode_:
;reset the mcbsp usin serial port control register2
	*port(SPCR1_0)=#1800h;#0210h	;0200
	
	;set the mcbsp value
	*port(SPCR2_0)=#0200h;#2010h;80
	;pin control register
	*port(PCR0)=#0a0dh  ;active high, 3 is thoery value. 
	
	;*port(RCR1_0)=#0000h ;receive frame don't ignal, and delay=1 bit
	*port(RCR2_0)=#0005h
	
	*port(XCR2_0)=#0005h;;change here
	;*port(XCR1_0)=#0000h ;change here for the frame length and word length
	
	*port(RCR1_0)=#0040h ;receive frame don't ignal, and delay=1 bit

	*port(XCR1_0)=#0040h ;change here for the frame length and word length
	
	;set the mcbsp clk freqency in sample rate generater 2
	*port(SRGR2_0)=#2030h;#3028h;
	*port(SRGR1_0)=#0009h ;change the frequency here to /9+1
	repeat(#10)
	nop_16	
	;de-reset the serial port control register2 by 3 steps
	;1: sample rate generate
	;2: dx and dr
	;3: frame syc. 
	*port(SPCR2_0)=#0240h;#0250h
	repeat(#20)
	nop_16
	
	*port(SPCR2_0)=#0241h
	*port(SPCR1_0)=#1801h;old value is 0080 disable or 0081 enable
	
	*port(SPCR2_0)=#02c1h
	repeat(#80)
	nop_16	
	return
	;set the mcbsp value
	;*port(SPCR2_0)=#02c0h;#2010h;80
	;*port(SPCR1_0)=#1800h

	
	;set the mcbsp clk freqency in sample rate generater 2

	;set the mcbsp clk freqency in sample rate generater 2
	;*port(SPCR2_0)=#02c1h
	;*port(SPCR1_0)=#1800h
setTo8BitMode_:
	
	;reset the mcbsp usin serial port control register2
	;*port(SPCR1_0)=#1800h;#0210h	;0200
	;set the mcbsp value
	;*port(SPCR2_0)=#0200h;#2010h;80
	
	*port(RCR1_0)=#0000h ;receive frame don't ignal, and delay=1 bit
	*port(XCR1_0)=#0000h ;change here for the frame length and word length
	
	
	;set the mcbsp clk freqency in sample rate generater 2
	*port(SRGR2_0)=#2008h;#3028h;
	;*port(SPCR1_0)=#1801h;old value is 0080 disable or 0081 enable
	;*port(SPCR2_0)=#02c1h
	return
setTo40BitMode_:
;reset the mcbsp usin serial port control register2
	*port(SPCR1_0)=#1800h;#0210h	;0200
	
	;set the mcbsp value
	*port(SPCR2_0)=#0200h;#2010h;80
	;pin control register
	*port(PCR0)=#0a0dh  ;active high, 3 is thoery value. 
	
	;*port(RCR1_0)=#0000h ;receive frame don't ignal, and delay=1 bit
	*port(RCR2_0)=#0005h
	
	*port(XCR2_0)=#0005h;;change here
	;*port(XCR1_0)=#0000h ;change here for the frame length and word length
	
	*port(RCR1_0)=#0240h ;receive frame don't ignal, and delay=1 bit

	*port(XCR1_0)=#0240h ;change here for the frame length and word length
	
	;set the mcbsp clk freqency in sample rate generater 2
	*port(SRGR2_0)=#202ah;#3028h;
	*port(SRGR1_0)=#0009h ;change the frequency here to /9+1
	repeat(#10)
	nop_16	
	;de-reset the serial port control register2 by 3 steps
	;1: sample rate generate
	;2: dx and dr
	;3: frame syc. 
	*port(SPCR2_0)=#0240h;#0250h
	repeat(#20)
	nop_16
	
	*port(SPCR2_0)=#0241h
	*port(SPCR1_0)=#1801h;old value is 0080 disable or 0081 enable
	
	*port(SPCR2_0)=#02c1h
	repeat(#80)
	nop_16	
	return